Implement program.assert.

Closes #136.
bigeasy · Jan 18, 2016 · 6c510df · 6c510df
1 parent 20a98a4
commit 6c510df
Show file tree

Hide file tree

Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/program.js b/program.js
@@ -104,6 +104,10 @@ Program.prototype.required = function () {
     }, this)
 }
 
+Program.prototype.assert = function (condition, message) {
+    if (!condition) this.abend(message)
+}
+
 Program.prototype.numeric = function () {
     this.validate.apply(this, [ '%s is not numeric' ].concat(slice.call(arguments))
                                                      .concat(isNumeric))

diff --git a/t/arguable/program.t.js b/t/arguable/program.t.js
@@ -62,6 +62,14 @@ function prove (async, assert) {
         assert(error.stderr, 'A bad thing happened.', 'error with code')
         assert(error.code, 127, 'code for error with code')
     })
+    createProgram(__filename, {}, [], io = {
+        stderr: new stream.PassThrough
+    }, cadence(function (async, program) {
+        program.assert(true, 'badness')
+        program.assert(false, 'badness')
+    }), function (error, code) {
+        assert(error.stderr, 'A bad thing happened.', 'failed assertion')
+    })
     createProgram(__filename, {}, [], io = {
         stderr: new stream.PassThrough
     }, cadence(function (async, program) {
@@ -157,4 +165,4 @@ function prove (async, assert) {
     io.events.emit('SIGINT')
 }
 
-require('proof')(28, cadence(prove))
+require('proof')(29, cadence(prove))